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(No Model.)

. G. M. FARRAR. REVERSING GEAR FOR STEAM ENGINES.

No. 446,992. Patented Feb. 24, 1891.

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. UNrrED STATES PATENT F'FICE';

CIIILION M. ARRAR, OF BUFFALO, NE\V YORK.

REVERSING-GEAR FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 446,992, dated February 24, 1891.

Application filed November 3, 1890- Serial No. 370,137. (lio model.)

To all whom it may concern:

Be it known that I, CHILIoN M. FARRAR, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Reversing-Gears for Engines, of which the following is aspecification.

This invention consists in certain improvements in devices for operating the link for reversing the action of a steam-engine, and will be fully and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure l is a side elevation of a steam-engine cylinder, showing a link connected therewith, and a side elevation of the device for operating it. Fig. 2 is a rear end elevation of an engine-cylinder, showing my device connected therewith as viewed from that point. Fig. 3 is a detached front view of the arm for lifting the link. Fig. 3 is a detached rear view of the operating arm-piece, showing a section through line a Z), Fig. 2. Fig. 4 is a detached longitudinal sectional elevation cutting through the arm-piece and its several parts, also through a portion of the bracket by which it is attached to the engine-cylinder. Fig. 5 is a detached front view of the flanged portion against which the link-lifting arm rests when pivoted in place.

The object of this invention is to provide an easy an efficient means for operating the link of an engine, and thereby reversing its action while running either direction, the device being adapted for operating either at the engine or at a distance and for relieving the valve-stem arm and pin from all strain resultin g from the motion of the link, and thereby producing a strain on the valve-stem, its crank-pin, or the eccentric.

In said drawings, 1 represents the cylinder of an engine having my device connected with it. The valve-stem 2 is made in the ordinary way, and is provided with the usual valvestem arm 3, on which is pivoted a grooved friction-roller 4, the groove surrounding the periphery of the roller, so as to leave the two surrounding flanges 5. Between the flanges 5 the two opposite inner sides 6 and 7 of the link tare fitted so as to slide easily up or down therein. This construction provides a free vertical movement up and down for the link; but this whole construction, as far as at present described, is old and well known. A further description is therefore not required here.

At a convenient point on the cylinder 1 is secured a supporting-bracket 8 by bolts 9, (see Fig. 1,) the usual way. The outer end of this supporting-bracket is provided with an enlarged portion 10, having a flat circular flanged portion 11 and having a sector-shaped portion removed from the upper part of the same, thereby leaving a correspondinglyshaped open space 12 between the parts 13 and 1e. (See Fig 3%) In the enlarged portions 10 and 11 is rigidly secured a forwardly-proj ecting pin 15, on which is pivoted the arm-piece 16, so as to turn easily thereon. This arm-piece 16 is also provided with aflat-faced flange portion 17, (see Fig. 2,) having a sector-shaped portion 18 projecting from its inner face forward into the open space 12. It is made enough smaller than the open space between the stationary portions 13 and let to permit sufficient room to give the required limited movement to armpiece 16 and its arm 18, the movement back and forth being limited each way exactly as required by the sides 13 and 14c of-the opening 12. The arm 18 is secured by bolts 19 to the arm-piece 16. 1

Projecting forward from the flanged portion 17 is a hub 20, (see Fig. 2,) at the outer end of which is a circular flanged portion, one side extending out so as to leave a semicircular raised portion 21, thereby leaving the depressed portion 22. Into the depressed portion 22 is fitted the end 23 of the arm 2st, so

as to turn on the pin 15, to which it is secured by a pin 25. This construction leaves a slight opening between the parts 6 and f, so that the arm has a slight motion on the pin 15. To the arm 24: is pivoted a connecting-rod 26, having its lower end pivoted to a cross-piece 27, which is rigidly secured to the link. The object of this construction is to permit the arm 24 to vibrate sufficiently to allow for the motion due to the action of the link while the engine is in motion, and thereby prevent the breaking of the parts.

A rod 28 may be connected to the reversingarm 18 for reversingthe engine at a distance in the usual way.

I have shown this device connected to a rolling valve; but it may he used as well on a slide-valve.

I claim as my inventiou 1. In a reversinggear for engines, a reversing-arm having a projecting semicircular portion21,providedwithends f and a depressed surface 22, pivoted to a supporting-pin on the engine, in combination with an arm connected by a connecting-rod with the link and provided with portions 0, a hub 23, and mounted on the same supporting-pin connected to the engine, snhstai'itially as and for the purposes described.

2. In a reversing-gear for engines, a reversing-arm pivoted on apin secured to a support on the engine, having an opening, 9, a

projecting portion 18 on one side of: the reversing-arm, projecting into the opening 1.2, and at the opposite side a circular portion having a semicircular projecting portion 91' with end portions?" and a depressed portion 22, in combination with an arm 24-, provided with portions 0 and mounted on the same pin in the depressed portion 22, so as to leave a slight opening between the parts e and I", and a connecting-rod connecting the arm 24: with thelink, substantially as and for the purposes described.

CIVIILION N. FAR'RAR.

Witnesses:

JAMES Simes'rnn, J ENNIE )I. CALDWELL. 

